The 100MS is an epoxy encapsulated electromagnetic/electrostatic interference (EMI) shield for use with circuits where sensitivity to EMI is critical. It was designed to attenuate EMI by converting electromagnetic field energy into heat that is absorbed by the shield and by shunting electrostatic fields to common. The 100MS may be used in applications to either confine or exclude EMI. Its cavity was designed for 28.45mm x 28.45mm x 7.24mm, 20-pin hybrid packages. The shields in the cover and base plate are in two separate halves to maintain the electrical isolation between the adjacent rows of pins of the module it encloses. Because of the spacing between the shield halves and epoxy flow holes, the 100MS provides a partial, but adequate low reluctance path for electro-magnetic flux. The 100MS is well suited for use with isolation modules such as the Burr-Brown 3656, 722, and 724.